Augustine, St., II, [23].
Aurora borealis, I, 134.
Austen, Jane, I, 191.
Auzout, A., II, [300].
Aviation, Early ideas of, II, [8].
Babbage, C., I, 207, 290, 291; II, [181].
Bachet, de Méziriac, I, 161.
Bacon, F., I, 5, 75, 75, 76, 79, 89, 145, 331.
Bacon, R., I, 5, 126, 126, 360; II, [94].
Baconian controversy, I, 141.